January 2016 IEEE 802.11-16/0104r0: Rate Matching for HE-SIG-B

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The document from January 2016 focuses on rate matching for HE-SIG-B in IEEE 802.11-16/0104r0 standard. It delves into the encoding/decoding structure, example of SIG-B with code-rate, MCS table, proposed encoding method for HE-SIG-B, and the structure of HE-SIG-B per-STA information field. The content discusses common fields, per-STA information, modulation schemes, encoding techniques, and interleaving processes. Detailed information is provided on various aspects related to HE-SIG-B in this technical document.

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January 2016 doc.: IEEE 802.11-16/0104r0 Rate Matching for HE-SIG-B Date: 2016-01-18 Authors: Name Affiliations Address Phone email 9008 Research Dr Irvine, CA 92618 daewon.lee at newracom.com Daewon Lee Newracom 9008 Research Dr Irvine, CA 92618 yujin.noh at newracom.com Yujin Noh Newracom 9008 Research Dr Irvine, CA 92618 minho.cheong at newracom.com Heejung at yu.ac.kr Minho Cheong Newracom Yeungnam Univ./ Newracom Heejung Yu Submission Slide 1 Daewon Lee, Newracom

January 2016 doc.: IEEE 802.11-16/0104r0 HE SIG-B Encoding/Decoding Structure Common Field Per-STA information Field SIG-B Padding bits RU alloc. unit RU alloc. unit CRC /Tail CRC /Tail CRC /Tail CRC /Tail STA info STA info STA info STA info Padding STA info Decode Block #3 Decode Block #4 Decode Block #2 Decode Block #1 The common field, per-STA information field is encoded and potentially separately decoded. Submission Slide 2 Daewon Lee, Newracom

January 2016 doc.: IEEE 802.11-16/0104r0 Example of SIG-B with Code-Rate Common (or STA specific) Info. Field Common (or STA specific) Info. Field Input Bits x0 x1 x2 x3 x4 x5 x24 x25 x26 x27 x28 x29 x30 x31 x32 x33 x34 x35 Rate- matching Unit Rate- matching Unit Tail Bits Common (or STA specific) Info. Field Common (or STA specific) Info. Field BCC output Bits a0 a1 a2 a3 a4 a5 a24 a25 a26 a27 a28 a29 a30 a31 a32 a33 a34 a35 b0 b1 b2 b3 b4 b5 b24 b25 b26 b27 b28 b29 b30 b31 b32 b33 b34 b35 Common (or STA specific) Info. Field Common (or STA specific) Info. Field Rate Matching Output Bits b3 b5 b27 b29 b30 b32 b33 b35 a0 b0 a1 a3 a4 a27 a28 a30 a31 a33 a34 b2 Submission Slide 3 Daewon Lee, Newracom

January 2016 doc.: IEEE 802.11-16/0104r0 MCS Table & Rate Matching Unit MCS Index Code-Rate Modulation 0 1/2 BPSK 1 1/2 QPSK No Issue 2 3/4 QPSK 3 1/2 16 QAM Potentially Problematic 4 3/4 16 QAM 5 2/3 64 QAM 6 3/4 64 QAM 7 5/6 64 QAM 8 3/4 256 QAM Not Used in SIG-B 9 5/6 256 QAM Submission Slide 4 Daewon Lee, Newracom

January 2016 doc.: IEEE 802.11-16/0104r0 Propose Encoding Method for HE SIG-B SIG-B Contents STA specific Field Common Field (may contain information for1 or 2 STA) STA specific Field Matching Matching + Padding + Padding Rate (may contain information for1 or 2 STA) Rate Common Field Encoding Encoding Rate-Matching Rate-Matching Interleaving performed in units of OFDM symbol (i.e. Ncbps) Interleaving Modulation iFFT Submission Slide 5 Daewon Lee, Newracom

January 2016 doc.: IEEE 802.11-16/0104r0 Proposed HE-SIG-B Structure Per-STA information Field Per-STA information Field Per-STA information Field N N 8 N N N 8 bits M RU alloc. unit RU alloc. unit CRC/ Tail CRC/ Tail CRC/ Tail CRC/ Tail STA info STA info P P STA info P STA info P Padding STA info SIG-B Padding Common Field Rate-Match Padding Filler Bits are added to each encoding/decoding block Filler Bits are added only if needed In case of encoding block is not multiple of 3 for MCS 2, 4, 6 In case of encoding block is not multiple of 2 for MCS 5 Submission Slide 6 Daewon Lee, Newracom

January 2016 doc.: IEEE 802.11-16/0104r0 Example of the Solution with Code-Rate Common (or STA specific) Info. Field Filler Bits Common (or STA specific) Info. Field Input Bits x0 x1 x2 x3 x4 x5 x24 x25 x26 x27 x28 x29 x30 x31 x32 x33 x34 x35 Rate-matching Unit Rate-matching Unit Tail Bits Common (or STA specific) Info. Field Common (or STA specific) Info. Field BCC output Bits a0 a1 a2 a3 a4 a5 a24 a25 a26 a27 a28 a29 a30 a31 a32 a33 a34 a35 b0 b1 b2 b3 b4 b5 b24 b25 b26 b27 b28 b29 b30 b31 b32 b33 b34 b35 Common (or STA specific) Info. Field Common (or STA specific) Info. Field Rate -Matching Output Bits b3 b5 b27 b29 b30 b32 b33 b35 a0 b0 a1 a3 a4 a27 a28 a30 a31 a33 a34 b2 Info. Field is boundary aligned with rate-matching unit Submission Slide 7 Daewon Lee, Newracom

January 2016 doc.: IEEE 802.11-16/0104r0 Conclusion Filler bits for HE-SIG-B allow completely separate decoding of each STA-specific information field and common field. Without filler bits, the receiver will have to take into account bit position of the decoding block and implement a different rate-matching pattern for each decoding block. Rate-matching implementation is a integral part of BCC decoding, therefore changes in rate-matching may result in additional change in receiver implementation. Submission Slide 8 Daewon Lee, Newracom

January 2016 doc.: IEEE 802.11-16/0104r0 Strawpoll #1 Do you agree to added the following text to SFD When MCS 2, 4, or 6 is configured for HE-SIGB, up to 2 (zero valued) filler bits are added after each tail bits of HE-SIG-B encoding block (i.e. common field and STA-specific information field) such that length of an encoding block (including the filler bits) is multiple of 3. When MCS 5 is configured for HE-SIGB, up to 1 (zero valued) filler bits are added after each tail bits of HE-SIG-B encoding block (i.e. common field and STA-specific information field) such that length of an encoding block (including the filler bits) is multiple of 2. Y/N/A Submission Slide 9 Daewon Lee, Newracom